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Negotiations over the water supply for 40 million people hinge on how you interpret the words "will not cause," written into the century-old Colorado River Compact.
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A signing ceremony was held Wednesday in Phoenix for a sweeping water rights settlement that has been decades in the making. Leaders of the Navajo Nation, Hopi Tribe and others called the agreement “historical.”
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The National Weather Service warns this year's monsoon season will likely be dry and hot again with multiple northern Arizona cities already projected to see below-normal precipitation.
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Some experts say the System Conservation Pilot Program — or SCPP — is costly and may not be the most effective way to save Colorado River water.
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Navajo officials are celebrating signing legislation outlining a proposed water rights settlement that will ensure supply from the Colorado River for three Native American tribes and more security for drought-stricken Arizona.
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A key U.S. Senate committee has unanimously approved a broad set of initiatives to help shore up flood and drought resistance in northern Arizona as part of a larger water bill.
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A new, first-of-its-kind study on evaporating snow could help cities and farms that use water from the Colorado River. The results may lead to more accurate forecasts for water supplies.
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The U.S. Bureau of Reclamation has finalized its guidance for protecting water levels in Lake Powell and Lake Mead.
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Across the Rocky Mountains, snow is starting to melt. That water will flow into the Colorado River. Forecasters are optimistic about this summer’s water supply, but a lot could still change.
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A coalition of environmental groups has sent a proposal about managing the Colorado River to the government. The authors say it shouldn't compete with existing state plans, but instead make sure those state rules also consider the environment.